When engineers compare pla+ vs pla for real-world applications, they need more than anecdotal experience. They need quantified data on strength, thermal behavior, and print quality. This article provides a detailed, data-driven comparison of the mechanical and thermal properties that matter most for functional 3D printed parts.
PLA+ vs PLA: Tensile Strength Comparison
Tensile strength measures how much pulling force a material can withstand before breaking. In the pla+ vs pla comparison, this is where the most consistent difference appears:
| Test Specimen | Standard PLA | PLA+ (Brand A) | PLA+ (Brand B) |
|---|---|---|---|
| Tensile at Yield | 48-52 MPa | 52-58 MPa | 55-62 MPa |
| Tensile at Break | 42-48 MPa | 48-55 MPa | 50-58 MPa |
| Young’s Modulus | 3.0-3.5 GPa | 2.8-3.3 GPa | 2.9-3.4 GPa |
| Rek bij breuk | 3-5% | 7-15% | 10-18% |
The critical insight in pla+ vs pla tensile testing is elongation at break. Standard PLA behaves like a ceramic—it snaps suddenly with minimal strain warning. PLA+ stretches before breaking, giving it a “failure window” that allows visual inspection before catastrophic part failure. This property alone makes PLA+ preferable for any part that will bear load.
Heat Resistance: The Overlooked Differentiator
Heat resistance is measured by the Heat Deflection Temperature (HDT), which indicates the temperature at which a material begins to soften under load. When comparing pla+ vs pla in thermal performance, the differences are modest but can be significant in specific applications.
Standard PLA begins softening noticeably around 50-55°C. PLA+ typically adds 3-5°C to this threshold, reaching 55-60°C. While this seems minor, it can mean the difference between a part surviving in a hot car in summer (interior temperatures can reach 55-65°C in direct sunlight) or deforming within minutes. For parts intended for indoor use or temperature-controlled environments, this difference is irrelevant. For automotive interiors, kitchen appliances, or outdoor installations, it becomes critical.
Impact Resistance and Toughness
Impact resistance is the property that most dramatically separates pla+ vs pla. Standard PLA absorbs approximately 4-6 kJ/m² of impact energy before fracturing—roughly comparable to polystyrene. PLA+ absorbs 8-14 kJ/m², placing it closer to ABS in impact performance.
This 100-150% improvement transforms the practical utility of PLA-based parts. A gear printed in standard PLA will shatter if dropped onto a concrete floor from waist height. The same gear printed in PLA+ will typically survive multiple identical drops. For products shipped to customers, this shock-absorption capability significantly reduces damage during transit.
Layer Adhesion and Interlaminar Strength
Interlayer bonding strength is the Achilles heel of FDM printing, but it is an area where PLA+ excels. Standard PLA achieves 50-60% of its bulk strength across layer boundaries, creating natural fracture planes. PLA+ typically achieves 65-80% interlayer strength—a significant improvement that makes printed parts behave more like homogenous, injection-molded components.
Print Quality: PLA+ vs PLA Surface Finish
At optimized temperatures, PLA+ tends to produce a slightly glossier surface finish than standard PLA. The plasticizers and modifiers in PLA+ promote smoother melt flow, which fills minor gaps between extrusion lines more effectively. However, printing PLA+ at the wrong temperature (too low) magnifies surface defects because the modifiers interfere with proper melt behavior. Always perform temperature tower calibration when switching between PLA and PLA+ brands.
Why Choose Nylon Plastic for Your 3D Printing and Engineering Plastic Needs
With over 10 years of experience in engineering plastics, Nylon Plastic supplies high-performance materials to B2B clients worldwide. Our product range covers nylon (PA6, PA66, PA12), POM, PEEK, and 3D printing filaments including PLA, PLA+, and PETG. Every batch is tested for diameter tolerance (±0.03mm), moisture content, and mechanical properties before shipping.
- ISO 9001 certified manufacturing facilities
- Bulk supply with competitive B2B pricing
- Technical support for material selection and printing parameters
- Fast global shipping from multiple warehouses
- Custom material formulation available for OEM projects
Gerelateerde lezen
- PLA vs PLA: Understanding the Different PLA Filament Grades
- PLA vs PLA+: Which Filament Should You Choose?
- 3D Printing Materials Comparison
Veelgestelde vragen
Does PLA+ need higher nozzle temperatures than standard PLA?
Yes, typically 5-15°C higher. Most PLA+ filaments, including popular brands, print optimally at 200-230°C nozzles, compared to 190-220°C for standard PLA. Start at 210°C and run a temperature tower to find the sweet spot for your specific PLA+ brand. Printing too cold produces poor layer adhesion that negates the performance advantage of PLA+.
Can PLA+ be annealed for better heat resistance like standard PLA?
Yes, but with different results. Annealing (heating the printed part to just below the glass transition temperature for an extended period) increases crystallinity and heat resistance in both materials. However, PLA+ parts typically shrink less during annealing (0.3-0.7% vs 0.5-1.2% for standard PLA), making it easier to maintain dimensional accuracy in heat-treated parts.
How does PLA+ compare to PETG in the pla+ vs pla discussion?
PLA+ bridges the gap between standard PLA and PETG. PLA+ offers better stiffness and easier printing than PETG but less heat resistance (PETG softens around 70-75°C). PLA+ is superior to PETG for applications needing high rigidity and moderate toughness at ambient temperatures. Choose PETG when the part must withstand temperatures above 60°C or requires chemical resistance.
Do PLA+ properties degrade over time after printing?
PLA+ parts are susceptible to hydrolysis (moisture degradation) and creep under sustained load, similar to standard PLA. In dry, room-temperature environments, mechanical properties remain stable for years. In humid conditions or under continuous load, expect gradual property loss. For long-term critical applications, consider nylon (PA6 or PA12) which offers superior creep resistance and durability.
